Keep in mind, it is a property of the wave medium, so we have to do something to the string to alter the wave speed. From earlier discussions, we know that tightening the string increases the wave speed.
Infants. Most infants receive the majority of their protein from breast milk or infant formula. The Institute of Medicine recommends babies ages 0 to 6 months consume at least 9.1 grams of protein, and infants ages 7 to 12 months eat at least 11 grams of protein every day.
You need protein for your muscles, bones, and the rest of your body. Exactly how much you need changes with age: 1  Babies need about 10 grams a day. 2  School-age kids need 19-34 grams a day. 3  Teenage boys need up to 52 grams a day. 4  Teenage girls need 46 grams a day. 5  Adult men need about 56 grams a day. 6  Adult women need about 46 grams a day (71 grams, if pregnant or breastfeeding).